Boiler-tube blower.



R. HARTWELL.

BOILER TUBE BLOWER.

APPLIGATION FILED Nov. e, 1912.

Patented Nov.3,1914.

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THE NORRIS PETERS C01. PHOTO-L|THU.. WASHINGTON. D4 C.

ROY I-IARTWELL, OF MARION, ILLINOIS.

, IBOILER-TUBE BLOWER.

Specification of Letters Patent.

Application filed November, 1912. Serial No. 728,805.

T0 all whom t may concern Be it known that I, ROY I-Linrwnni., a citizen ofthe United States, residing at Marion, in the county of'Williamson and State of Illinois, have invented certain new and useful Improvements in Boiler-Tube Blowers, of which the following is a specification.

My invention relates to a device for cleaning boiler tubes, by blowing steam or coinpressed. air through the same.

An important object of this invention is to provide a deviceofthe above mentioned character, which may be bodily 'supported and readily :handled byy a single operator, who inserts the nozzle of the device in the ends of the dierent boiler tubes.

A further object of the invention is to provide a device of the above mentioned character having a control valve which is automatically returned to its seat or closed position bythe pressure of the compressed air or steam, wherebyy as soon as the manually operated control lever is released. the supply of compressed air or steam will be instantaneously cut olf, thus preventing the steam or soot from being blown back upon the operator when the nozzle of the device is being removed from within the end of the boiler tube.

A further object of my invention is to provide a nozzle of improved construction, which will deliver" a circumferentially enlarged stream of compressed air or steam,

so that the same will completely fill ther boiler tube to act upon the inner wall there of for the purposeof thoroughly removing the soot or other deposits. 0

A further object of this invention is provide a device of the above mentioned character, which is simple in construction, cheap to manufacture, strong and durable.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals v are employed to designate like parts throughout the same, Figure 1 is a central vertical longitudinal sectional view through the device, parts thereof beingshown in elevation, and, Fig. 2 is an end view of the discharge end of the nozzle.

In the drawings wherein for the purpose of illustration, I have showna preferred embodiment of my invention, the numeral 3 designates a tubular 'body'portiom' having an extension or casting i formed upon one end thereof. Connected with the extension 4 isa preferably tubular handle 5, the same having screw-threaded engagement: therewith,as shown. Connected with ythetuliiular body portion 3 and the extension l and preferably cast integral therewith, isa supply pipe 6,k which vis, spaced from the tubular handle 5 and parallel thereto, as shown. Suitably connected with the'free end of the supply pipe 6 is a hose or conduit 7, which has vconnection witha source of compressed air' or steam (not shown). The tubular body portion 3 is providedwith'ascrewthreaded tubular extension -8, having conratentea Nov. s, 1914.. y

nection with a tubular shankcarrying a loopfhandle 10, as shown.

Thenumeral 11 designates theouter shell of a nozzle, which shell isconical and in-` creases in diameter toward itsfree end, as` l shown.

This main shell is constructed of a suitable diameter to properly k'fit within y the end of the boiler tube. At its `reduced end the shell 11 is screwfthrcaded, as shown, for connection with a coupling 12,1which has screw-threaded engagement with the"-` forward end'of the tubular body portion 3. Disposed concentrically within the main shell 11 land suitablyfspaced Luponthe inner f wall thereofis aconicaldeflector 13, which increases in ydiameter toward the large'end of the shell 11. This conical deflector 13 'is preferably formed hollow and is connected with the shell 11 by means lof radially disposed ywebs lll, as shown. The function of constructing theouter shell 11 andA deflector `13 conical with their diameters increasing towardthe outer or free ends thereof,is tov provide means to spread or circumferen-` tially increase the size of the stream of compressed air or steam, whereby the saine will completely fill the diameter of the boiler l vtube and properly engage the inner wall thereof to thoroughly remove the soot or y other deposits found thereon.A n A Connected in the supply pipe 6 is a selfclosing valve structure, comprising a valve shell 15 divided into two chambers by a;

transverse web 16, having an opening 17, the walls of which serve as a valve seat for a reciprocatory valve 18. The valve 18 is carried by a reciprocatory stem 19,'which is mounted through an apertured boss 20, as shown. The boss 20 is. screw-threaded for engagement with a cap 21, which provides a chamber 22 for receiving packing, to prevent any leakage about the stem 19. At its opposite end the stem 19 operates within an opening formed' in aplug 23, having screwthreaded engagement with the shell 15, as shown. A spring 24 surrounds the stem 19,

and is confined between the valve `18 and the plug 28. It is thus seen that the springQ urges the valve 23 into engagement with its seat. The valve stem 19 extends outwardly beyond the cap 20, and is engaged by one end of a pivoted operating lever 25, which is mounted upon a bracket or extension 2G, carried by the supply pipe 6, as shown.

The operation of the device is as folllows:'l`he operator takes hold orthe handle 10 with his left hand and the handle 5 with his right hand, and inserts the shell 11 in the boiler -tube to be cleaned. The operating valve 18 being closed, the compressed air or steam in the supply pipe 6 willV tend to hold the same closed and will tend to re turn the sameto its closed position, when moved therefrom. Without taking yhis right hand off of the handle 5, the operator places his ngers'upon the operating lever 25 and swings the lower end thereof toward the handle 5. rlhe valve 18 is thus unseated, whereby the compressed air Lor steam is fed throughthe tubular body portion 3 and dis` charges romthe nozzle into the boiler tube. As soon as the control lever 25 is released, the spring 24 and the pressure within the supply pipe 6, will instantaneously close or seat the valve 18, thus cutting off the supply of compressed air or steam, whereby when the nozzle is removed from within the boiler tube, the steam or soot will not be blown upon the operator. It is thus seen that I have provided a self-closingivalve structure, which is operated by a manuallymoved control lever, disposed in a convenient position with relation to the handle 5, whereby such control lever may be moved without releas ing such handle. The nozzle is so constructed that it spreads or circumferentially increases the size of the stream of compressed air or steam, whereby such stream will properly engage the inner wall of the boiler tube.

It is to be understood that the form of my invention herewith shown and described, is to be taken as a preferred example of the same and that certain changes in the shape, size and arrangement of parts may be resorted to without departing fromv the spirit of the invention of the scope of the subjoined claim. y Y

Having fully described my invention, I claim:-

The combination with a tubular body portion having a tubular lateral extension, of a nozzle attached to the :tree end of the tubular body portion and adapted for insertion in the tubes of a boiler and to be removed therefrom, va flexible pressure supply pipe connected with the tubular lateral eXtension, a self-closing valve connected in the tubular lateral. extension, a lever pivoted with the tubular lateralextension and eX- tending longitudinally of the same a and adapted to open the valve when its free end is moved away from the tubular lateral eX- tension, a laterally extending handle connected with the tubular body portion outwardly of the tubular lateral extension and having the free end of the lever disposed adjacent the same, and a second laterally extending handle connected with the tubular body portion between the nozzle and the tubular lateral extension. v l

In testimony whereof I aix my signature in presence of two witnesses. l

. lROY HARTWELL. Witnesses Burns NEELY, JOHN ISAAGS.

`Copies of this patent maybe obtained for ve cents each, by addressing the Commissioner of Patel-its,

Washington, D. C. 

